Hardrace Reinforced 17.2mm Front Sway Bar BushHardrace reinforced stabilizer bushings are made of exclusive thermoplastic material for increased strength and hardness, oil alkali ozone resistant properties and self lubricated function. Unlike ordinary NBR that tends to break easily or polyurethane that often causes squeaks and harsh rides, these bushings can achieve a perfect balance between the two, offering superior suspension response and durability while maintaining great ride quality. .